package com.vincent;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class CharacterEncodingFilter implements Filter {
	String characterEncoding;
	boolean enabled;
	
    public CharacterEncodingFilter() {
    }

    public void init(FilterConfig fConfig) throws ServletException {
    	characterEncoding = fConfig.getInitParameter("characterEncoding");
    	enabled = "true".equalsIgnoreCase(fConfig.getInitParameter("enabled").trim());
    }

	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		if (enabled || characterEncoding != null) {
			request.setCharacterEncoding(characterEncoding);
			response.setCharacterEncoding(characterEncoding);
		}
		chain.doFilter(request, response);
	}

	public void destroy() {
	}
}
